Automatic stop for sound-reproducing machines



April 29, 1924.- 1,491,932

0. F STUPPAN AUTOMATIC STOP FOR SOUND REPRODUCING MACHINES Filed Oct.12. 1921 '2 Sheets-Sheefl FIG. 1

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ENTOR ATV-OR E Apri? 29, 1924. 1,491,932

0. F STUPP'AN AUTOMATIC STOP FOR SOUND REPRODUCING MACHINES Filed Oct.12, 1921- 2 Sheets-Sheet 2 INVENTOR 0550 FJlu apafi/ ATTORN EY PatentedApr. 29, 1924.

UNITED STATES I P AT in32 I OTTO F. STUPBAN, F MILWAUKEE, WISCONSIN,ASSIGNQR TG'fiOLUMIBIA GRAIHO- IPHONE MANUFACTURING COMPANY, QFBRIDGEPO'RT, CONNECTICUT, A CORPORA- TION OF DELAWARE.

Auromanc error non sounn-nnrnonocme macnmns.

Application filed October 12, 1921. Serial Ho. 507,268.

To all uihom it may concern Be it known that I Or'ro F. STUP-PAN, t

- citizen of the United states and resident of Milwaukee, in the countyof Milwaukee and State of Wisconsin, have invented new and usefulImprovements in Automatic Stops for Sound-Reproducing Machines, of whichthe following is a description, reference being had to .the accompanyingdrawings, which are a part of this specification.

The invention relates to automatic stops for sound reproducing machines.

The object of the invention is to provide stop mechanism of a novelcharacter for an: tomatically stopping the drive of the machine when theplaying of the record has been completed without the necessity ofsetting the stop mechanism.

A further object of the invention is to provide a stop mechanism forsound reproducing machines which is automatically operated by a reversemovement of the tonearm on a completion of its inward travel on therecord.

The invention further consists in the several features hereinafter setforth and more particularly defined by claims at the conclusion hereof.

In the drawings: Fig. 1 is a plan view of a device embodying theinvention; Fig. 2 -is a side elevation view thereof.

Figure 3 is a plan view of the device, the full lines showing theposition of the parts when the tone-arm is swung to an extreme.

position to release the brake, and the dotted lines showing the positionof the parts when the brake is applied, and

Figure 4 is a detail view in plan of parts shown in Figure 3, the coilspring being omitted for the sake of clearness.

In the drawings the numeral 3 designates a brake member or lever pivotedon a pin 4 carried by a base plate '5 and engageable with the flangededge of the turntable 6 to stop the operation of the machine, the brakebeing provided with a handle 7 for setting it.

A latch 8 is pivotally mounted on a pin 9 carried by the plate 5 and .isheld in engagement with a notch 10 in the brake lever 3 by means of aspring 11 secured at one end toa projection 12 on the brake lever and atthe other to an arm 13 on the latch. When the latch 8 engages the lever,said'lever will be held in inoperative position until the latch isreleased.

F or releasing the latch I provide means which is inoperative while thetone-arm 14 swlnlgs inwardly as the stylus 15 travels inwar ly in theplaying groove of the record 16, but which acts upon said latch as soonas the stylus is given a reverse motion upon the completion ofthdrendition ofthe record.' For this purpose I provide a lever 17 whichis mounted on the pin 9 and operatively connected with the latch 8 bymeans of friction disks 18. This lever is connected to move with thetone-arm 14 by a pin 19 secured by a clamp 20 to said arm and engagingin a slot 21 insaid lever. When the- QFHCE With this construction thefrictional con-.. i

motion between the lever 17 and the latch 8 permits relative movementbetween said parts when the tonearm 14 moves inwardly while the recordis being played and such movement of the lever 17 also acts inconjunction with the spring 11 to hold the latch 8 against the brakelever. When the playing of therecord is completed the outward swing ofthe tone-arm by the action of the eccentric groove 22 causes the lever17 to oppose the spring 11 and release the latch 8 from the brake lever,this movement bein very slight but sufiicient to-unhook the late so thatthe spring 11 may then throw or swing the brake lever 3 into engagementwith the turntable to stop its rotation.

After the turn-table has been stopped in the manner just described, thebrake may be released and the turn-table again permitted'to rotate, byswinging the tone-arm into the extreme position shown in full lines inFigure 3 of the drawings. In this posi tion of the tone-arm, the latch 8is swung on its pivot 9 a distance sufiicient to move the spring 11 fromone side of the pivot 4 to theother side thereof, and thus cause thespring to rock. the brake member on its pivot in a direction away fromthe flanged edge of the turn-table. As the tone-arm is moved inwardlyfrom the full line position of Figure 3 towards the outer edge of therecord, the latch 8 will be swung upwardly .-noted that it is notnecessary to provide any special setting for the release of the latch 8on the completion -of the record, because this release is automaticallyeffected by the reverse movement of the 'tone-arm, due to the groove inthe record. This eccentric groove is nothingbut' a circular groove cutinthe record off center so that at one point it meets the last groove ofthe record and may be easily formed in the usual reords without anyspecial skill on the operators part.

I desire it to. be understood that this invention is not to be limitedto any specific form or arrangement of parts except in so far as suchlimitations are specified in the claims.

What I claim as my invention is:

1. In a sound reproducing machine, the

combination of a record with an eccentric terminal groove producing abackward swing of the tone-arm when the praying of the record hasceased, brake mechanism, including a member, a detent therefor, and aspring connecting the brake member and detent, and adapted to actuatethem to braking and retaining positions, respectively, and meansoperating on said brake mechanism during the backward swing of thetone-arm to stop the operation of the machine.

2. In a sound reproducing machine, the combination with the tone-arm, ofa brake member, a latch pivoted for holding said member in inoperativeposition, means movable with said tonearm and pivotally mounted torotate about the pivotal axis of the latch and means exerting axialfrictional pressure between the latch, and means whereby the latch isreleased upon a backward swing of the tone-arm, and means causing abackward swing of the tone-arm when the playing of the record iscompleted.

3. In a sound reproducing machine, the combination, with t e trippinglever of the brake mechanism, the record, the stylus and the tone-arm,of means moving with the tone-arm and having a frictional pivotconnection with said lever to operate the same on a backward swing ofthe tone arm, and means on the record engaged by the stylus when theplaying of the record is completed to produce t e backward swing of the4. In a sound reproducing machine, the combination, with t e trippinglever of the brake mechanism,the record, the stylus and the tone-arm, ofa member moving with the tone-arm, asprin washerestablish-ingfri'ctional connection etween the lever and said emember,whereb the lever is operated on a backward swing of the tone-arm, andmeans on the record engaged by the stylus when the playingv of therecordis completed to produce the backward swing of the tonearm.

5, In combination, a brake, ar -detent, a

single spring adapted to move both the brake and the detent to;effective position,

andmeans including the said spring for moving the brake to ineffectiveposition.

6. In combination, a' traveling member, a rotating member, a brake 'forthe latter, a pivoted detent, an operating arm-having a pinand-slotconnection with the traveling member and mounted coaxial withthedetent and having frictional connection therewith.

7. In a stop mechanism, a brakemember, a detent for retaining the brakemember 'in non-braking position, and a single spring adapted to yieldinly retain the brake member in brak ng an to move the brake member tonon-braking position.

8. In a stop mechanism, a rotating element and a-traveling element, andmeans whereby said traveling element is given a reverse movement at apredetermined point inits travel, a pair of coaxially mounted members,one adapted to be movedby said traveling element, and the other adaptedto actuate the stop mechanism to stopping position upon movement in onedirection, and means exerting pressure coaxially of said member toestablish a frictional connection between them, whereby movement of thetraveling element in reverse direction moves said actuating member instop-actuating direction.

9. In a stop mechanism, a rotating ele-,

ment and a traveling element, and means whereby said traveling elementis given a reverse movement at a predetermined point in its travel,'apivoted brake member, a pivoted detent adapted to be moved in onedirection to release said brake member, and

a member having frictional connection with .said detent and operativelyconnected to said traveling element, whereby movement of said travelinelement in reverse direct1on operates sal detent to release the brakemember.

10. In combination, a-traveling element having forward and backwardmovements,

11.'In combination, a traveling element Lsanasa I having forward andbackward movements, a rotating element, and a brake for the rotatingelement, and means for a plying the brake operable automatically oniywhen the traveling element is given a predetermined, backward movement.

12. In combination, a turn-table for supporting'a record, a tone-armadvanced over the turn-table by the rotation thereof, a brake forcausing the rotation of the turntable to cease, and brake-applying meansautomatically operative only as an incident to a predetermined backwardmovement of the tone-arm under the influence of the record.

13. In combination, a turn-table for supporting a record, a tone 'armadvanced over the turn-table by the rotation thereof, a

brake for causing the rotation of the turntable to cease, andbrake-applying means automatically operativelonly. as an incident to apredetermined backward movement of the tone-arm under the influence ofthe record, the said means itself causing the release of the brake upona backward move-. ment' of the tone-arm toward the edge of the record inexcess to such predetermined backward movement.

14. In combination, a turn-table for supporting a record, a tone-armadvanced over the turn-table by the rotation thereof, a

brake for causing the rotation of the turntable to cease,

and brakerapplying means automatically ope'rativeonly as an incident toa predetermined backward movement of the tone-arm under the influence ofthe record, the said means itself causing the release of the brake uponabackward movementpf the tone-arm toward the ed e of the record andbeing adapted to cause t e brake member to be yieldingly' urged toefiective positionwhen the tone-arm is advanced toward the playingposition. v v

15. In combination, a brake lever, a spring having one end connected tothe brake lever, a lever connected to the other end "ofthe" spring, thelast-named lever whereby the spring is caused to yieldingly urge thebrake lever toward operative position, or to yieldingly retain the brakelever in inoperativeposltion. I

16. lln combination, trollinglever for the brake lever, a sprinconnectin "the two named members an normally% ing in a line at one sideof the pivot point of the lever, and means for shifting the position ofthe brake-controlling lever, to cause the s ring to cross the pivotpoint ofthe brake liiver and. to retain the brake lever in inefi'ectiveposition.

and means for shifting a brake lever, a cono'rro r. s'rnrraiv.

